package org.jasig.cas.cuscon;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;

/**
 * Created by Administrator on 2017/5/24/024.
 */
@SuppressWarnings("ALL")
@Controller
public class CaptchaCodeController {

    @Autowired
    private Producer producer;

    @RequestMapping(value = "/captcha.v")
    public void captchaVcode(HttpServletRequest request, HttpServletResponse response){
        response.setDateHeader("Expires", 0);

        // Set standard HTTP/1.1 no-cache headers.

        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        // Set IE extended HTTP/1.1 no-cache headers (use addHeader).

        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        // Set standard HTTP/1.0 no-cache header.

        response.setHeader("Pragma", "no-cache");
        // return a jpeg

        response.setContentType("image/jpeg");
        // create the text for the image

        String capText = producer.createText();
        // store the text in the session

        request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);
        // create the image with the text

        BufferedImage bi = producer.createImage(capText);
        ServletOutputStream out = null;
        try {
            out = response.getOutputStream();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // write the data out

        try {
            ImageIO.write(bi, "jpg", out);
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                if(out!=null){
                    out.close();
                }
            }catch (Exception e){
                e.printStackTrace();
            }
        }
    }
}
